Speculum



Y (o Model.)

J. SPARENBURG.

SPBCULUM.

No. 469,351. Patented Feb. 23, 1892.

wit/moed Swine/who@ UNITED STATES PATENT OFFICE.

J OIIN SPARENBURG, OF CHICAGO,` ILLINOIS.

SPECULUIVI.

SPECIFICATION forming part of Letters Patent No. 469,351, dated February23, 1892.

Application filed November 23, 1891. Serial No. 412.810. (No model.)

To @ZZ whom it may concern,.-

Be it known that I, J oHN SPARENBURG, a citizen of the United States,residing at Chi cago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Surgical Instruments;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention relates to obstetrical instruments, more particularlyspeculums, having for its object, among other things, to effect thesimultaneous actuation of the various sections of the expander, and toprovide for the joint action of the retaining spring and pawl; and tothese ends the invention consists of the novel construction andcombination of the parts, all as hereinafter disclosed, and pointed outin the claims.

In the accompanying drawings, Figure l is a perspective view of myimproved specu4 lum. Fig. 2 is a longitudinal section, and Fig. 3 across-section, thereof; and Fig. 4 is a detached perspective view of thecombined pawl and spring, being integral.

In the embodiment of my invention I provide the speculum or instrumentof that class having its expander A formed of three sections a ca d witha hook-like spring b,- preferably of flat or plate metal, having itsapertured straight portion fitted upon a headed screw-threaded pivot cof the upper two sections ce and beneath the base of the post d, withinwhich is fulcrumed the lower third section d of the expander. 'Ihelowercurved end of the spring bears against the upper side of the reduceddownwardly and outwardly inclined tang-like extension e of said lowersection a of the speculum and holds said section removably in place.

The extension c of the section d of the speculum has in its lower edge aslot or notch e', which engages a cross-pin c2 in the bifurcated lowerend of the post d, said slot or notch being engaged from below with thecross-pin after the insertion of the extension into the bifurcation ofthe post.

The upper speculum-sections a o, are provided with crossingobliquely-disposed studs or projections ff, between thelower freeportions of which rests-the lower single specu- Vlum section a".Therefore, as the upper speculum-sections d d are actuated they will,through the crossing obliquely-arranged studs or projections f f,actuate the lower speculurn-section a', thus effecting through saidmeans the simultaneous actuation of said section with the manipulationof the upper sections.

B is the pawl, with its integral spring B', for the automatic retentionof the speculumsections in their expanded position, consisting of theserrated-edgedknife-blade-like bar g, arranged crosswise of the handlesa2 d2 of the upper speculum-sections a d and adapted to engage a stud hon one of said handles.

The spring B consists of a coiled tensioned wire g', integral with thepawl B and having an eye 1.', receiving a pivot-stud c" on the otherhandle of the speculum-sections d a, to form a fulcrum for the pawl, thecoil of the spring being slipped around the post d, and the free end ofsaid spring being engaged with a projection j on the opposite handle.

This speculum, it will therefore be seen, is readily separable as to allits parts, and readily put together, and easily actuated or manipulated,and quickly cleaned, and free from liability to get out of order.

Having thus fully described my invention, what I claim, and desire tosecure by Letters Patent, is-

I. The speculum having its upper sections provided withobliquelyarranged crossing studs or projections adapted to engage theother section thereof, substantially as set forth. A

2. The speculuxn having the hook-shaped spring with its aperturedstraight portion fitting on the pivot-screw ofthe upper sections of thespeculum and having its lower curved end bearing against the lowerspeculurn-section, substantially as set forth.

3. The speculum having the combined pawl and spring, the two beingintegral,consisting of the serrated-edged bar adapted to engage a studon one handle of the instrument,

IOO

and the spring having an eye to receive a In testimony whereoflafxmysignature in proj eetion on the other handle "so serve as a presenceof two Witnesses. fulerum for said paWl and havingts coil slipped aroundthe fulerum-post of the upper I JOI-IN SPARENBURG. speculum-seetion andits free end engaging the Witnesses:

projection on the other handle, substantially EDWARD F. THOMAS,

as specified. GEO. S. FOSTER.

